<a href=http://onlineslangdictionary.com/meaning-definition-of/ragtop>ragtop</a> To link to this term in a wiki such as Wikipedia, insert the following. [http://onlineslangdictionary.com/meaning-definition-of/ragtop ragtop] Some wikis use a different format for links, so be sure to check the documentation.
Talc (1), the softest mineral on the Mohs scale has a hardness greater than gypsum (2) in the direction that is perpendicular to the cleavage. Diamonds (10) also show a variation in hardness (the octahedral faces are harder than the cube faces).
With a density of 6.5-7.0 (quartz is 2.65, calcite is 2.71), wulfenite is among the densest of all transparent minerals. However, because most of the elemental bonding in wulfenite is due to weak ionic bonds, wulfenite is soft, registering just 2.5-3.0 on the Mohs scale, or slightly softer than calcite.